<Solved> Remotes sync lost constantly

Hi, all.
First of all, thank you for the amazing amount of information you are sharing on this board.
If you feel I didn't search enough, I apologize in advance.

All of a sudden my remotes lost their sync. I have performed all the needed steps for basic resync (unplug, reset sync data by pressing sync button for 15 secs in health menu, new batteries in remotes) and managed to sync the remotes in the main Wii menu. Once I enter any channel, or restart the wii the sync is dropped again, and can't be reestablished without performing the whole procedure (15 sec, etc) again.